MdePkg/Library/BaseLib/Ia32/ReadEflags.c

   1 /** @file
   2   AsmReadEflags function
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9
  10
  11
  12 /**
  13   Reads the current value of the EFLAGS register.
  14
  15   Reads and returns the current value of the EFLAGS register. This function is
  16   only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a
  17   64-bit value on x64.
  18
  19   @return EFLAGS on IA-32 or RFLAGS on x64.
  20
  21 **/
  22 UINTN
  23 EFIAPI
  24 AsmReadEflags (
  25   VOID
  26   )
  27 {
  28   __asm {
  29     pushfd
  30     pop     eax
  31   }
  32 }
  33